（1）操作excel的几种开源框架

　　Apache POI

　　OpenXls

　　JEXCEL

　　JXLS

　　xlSQL

　　JCOM

package com.common;import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Iterator;import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFDataFormat;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;public class UploadExcel {public static void main(String[] args) throws IOException {String excelFilePath = "F://项目信息表格.XLSX";UploadExcel.readExcel(excelFilePath);//UploadExcel.writeExcel();
    }//对日期格式//数字类型的格式化public static String getFormatKey(short formatNumber, Date date){String format = "" ;SimpleDateFormat sdf = null;if(formatNumber == HSSFDataFormat.getBuiltinFormat("h:mm")){sdf = new SimpleDateFormat("HH:mm");}else if(formatNumber == HSSFDataFormat.getBuiltinFormat("m/d/yy")){sdf = new SimpleDateFormat("yyyy-MM-dd");}else if(formatNumber == HSSFDataFormat.getBuiltinFormat("m/d/yy h:mm")){sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");}else{sdf = new SimpleDateFormat("MM-dd");}format = sdf.format(date);return format;}public static String getCellValue(Cell cell){String cellValue = "";if(cell.getCellType() == Cell.CELL_TYPE_BOOLEAN){cellValue = String.valueOf(cell.getBooleanCellValue());}else if(cell.getCellType() == Cell.CELL_TYPE_NUMERIC){short format = cell.getCellStyle().getDataFormat(); //获取类型值String printString = "";if( format == 14 || format == 20 || format == 22|| format == 31 || format == 32 || format == 57 || format == 58){printString  =  UploadExcel.getFormatKey(format, cell.getDateCellValue());}else{DecimalFormat df = new DecimalFormat("#.#");printString = df.format(cell.getNumericCellValue()); }cellValue = printString;}else if(cell.getCellType() == Cell.CELL_TYPE_STRING){cellValue = cell.getStringCellValue();}else{cellValue = cell.getStringCellValue();}return cellValue;}//读excelpublic static void readExcel(String excelFilePath) throws IOException{FileInputStream inputStream = new FileInputStream(new File(excelFilePath));//读写xls和xlsx格式时，HSSFWorkbook针对xls，XSSFWorkbook针对xlsx
            Workbook workbook = null; int index = excelFilePath.lastIndexOf(".");String suffix = excelFilePath.substring(index + 1).toLowerCase();if ("xls".equals(suffix)){  workbook = new HSSFWorkbook(inputStream); }else if("xlsx".equals(suffix)){  workbook = new XSSFWorkbook(inputStream);  }  else{System.err.println("错误");}Sheet firstSheet = workbook.getSheetAt(0);int columns = firstSheet.getRow(0).getPhysicalNumberOfCells();int rows = firstSheet.getPhysicalNumberOfRows();for(int i = 0 ; i < rows; i++){Row row = firstSheet.getRow(i);for(int j = 0; j < columns; j++){Cell cell = row.getCell(j);System.out.println(UploadExcel.getCellValue(cell));}System.out.println("###");}/**Iterator<Row> iterator = firstSheet.iterator();while (iterator.hasNext()) {Row nextRow = iterator.next();int lastCell = nextRow.getLastCellNum();//一行的单元格个数，从1开始Iterator<Cell> cellIterator = nextRow.cellIterator();while (cellIterator.hasNext()) {Cell cell = cellIterator.next();switch (cell.getCellType()) {case Cell.CELL_TYPE_BOOLEAN:{System.out.print(cell.getBooleanCellValue());break;}case Cell.CELL_TYPE_NUMERIC:{short format = cell.getCellStyle().getDataFormat(); //获取类型值String printString = "";if( format == 14 || format == 20 || format == 22|| format == 31 || format == 32 || format == 57 || format == 58){printString  =  UploadExcel.getFormatKey(format, cell.getDateCellValue());}else{DecimalFormat df = new DecimalFormat("#.#");printString = df.format(cell.getNumericCellValue()); }System.out.print(printString);break;}case Cell.CELL_TYPE_STRING:{System.out.print(cell.getStringCellValue());break;}default : {System.out.print(cell.getStringCellValue());}}System.out.print("|");}System.out.println("###");}**/workbook.close();inputStream.close();}//写excelpublic static void writeExcel(){try {FileOutputStream fileOut = new FileOutputStream("F://poi-test.xls");HSSFWorkbook workbook = new HSSFWorkbook();HSSFSheet worksheet = workbook.createSheet("POI Worksheet");// index from 0,0... cell A1 is cell(0,0)HSSFRow row1 = worksheet.createRow((short) 0);HSSFCell cellA1 = row1.createCell((short) 0);cellA1.setCellValue("Hello");HSSFCellStyle cellStyle = workbook.createCellStyle();cellStyle.setFillForegroundColor(HSSFColor.GOLD.index);cellStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);cellA1.setCellStyle(cellStyle);HSSFCell cellB1 = row1.createCell((short) 1);cellB1.setCellValue("Goodbye");cellStyle = workbook.createCellStyle();cellStyle.setFillForegroundColor(HSSFColor.LIGHT_CORNFLOWER_BLUE.index);cellStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);cellB1.setCellStyle(cellStyle);HSSFCell cellC1 = row1.createCell((short) 2);cellC1.setCellValue(true);HSSFCell cellD1 = row1.createCell((short) 3);cellD1.setCellValue(new Date());cellStyle = workbook.createCellStyle();cellStyle.setDataFormat(HSSFDataFormat.getBuiltinFormat("m/d/yy h:mm"));cellD1.setCellStyle(cellStyle);workbook.write(fileOut);fileOut.flush();fileOut.close();System.out.println("读取结束");} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}
}